LT1374CR#TRPBF

Voltage - Output (Min/Fixed):	2.42V
Base Part Number:	LT1374
Supplier Device Package:	D2PAK-7
Package / Case:	TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	500kHz
Current - Output:	4.5A (Switch)
Voltage - Output (Max):	21.5V
Series:	--
Voltage - Input (Max):	25V
Voltage - Input (Min):	5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, SEPIC
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction
The LT1374CR#TRPBF is a fixed-frequency DC/DC switching regulator controller (SR). This SR works with a single-stage topology, which consists of a MOSFET switch, low-side Schottky diode, and an inductor. It is also known as a buck regulator for its ability to convert a higher voltage supply to a lower voltage output. It offers high efficiency and fast transient response, making it suitable for a wide range of applications where power is managed across multiple sources and multiple loads.

Applications
The LT1374CR#TRPBF can be used for a variety of applications that require efficient and accurate power management, such as notebook computers, netbooks, and cell phones. This type of SR is especially suitable for computing and network systems, as it can effectively reduce power dissipation and provide stable output voltage. Additionally, the LT1374CR#TRPBF can be used in non-isolated applications, allowing it to be employed in critical industrial applications, such as drives and motor control. Other applications of the LT1374CR#TRPBF includes automotive systems, automotive entertainment, handheld electronics, instrumentation, industrial controls, satellite communications, and precision circuits.

Features
The LT1374CR#TRPBF offers a few key features to improve its performance and reliability. It has an adjustable output voltage range of 1V-20V with a minimum output voltage of 1V. The output current can be programmed up to 2A with fast transient response and low output noise. This device is capable of an impressive efficiency up to 96%, allowing for a reduction in overall power dissipation. The LT1374CR#TRPBF also provides an adjustable switching frequency from 100kHz to 500kHz, which allows for optimized performance for various applications. Additionally, the LT1374CR#TRPBF has an adjustable soft-start feature, allowing it to ramp up its supply more smoothly and avoid overstressing system components.

Working Principle
The LT1374CR#TRPBF works using a pulse width modulation (PWM) operating scheme. This type of SR works by switching a MOSFET switch on and off at a given frequency. The device converts an input voltage to a lower output voltage by controlling the time duration that the MOSFET switch remains in the on state. The lower the output voltage, the greater the time duration that the switch is kept in the on state. The output voltage is regulated by comparing the output voltage and the feedback voltage at the error amplifier circuit, with any errors adjusted by the control circuitry.When the output voltage is higher than the reference voltage, the controller turns the MOSFET switch on, allowing the current to flow from the high voltage input to the inductor and reducing the output voltage. The current builds up in the inductor until the switch is turned off. The output voltage is regulated by the controller turning off the MOSFET switch, and the inductor releases the current stored in the inductor, through the low side Schottky diode, to the output. The output voltage will then be 1V lower than the voltage at the input and the cycle will repeat.The LT1374CR#TRPBF also allows the user to control the output current by changing the duration of the on and off times of the switch. These controlled times are also modulated depending on the desired output current. This makes the LT1374CR#TRPBF suitable for applications with varying current demands. Additionally, the LT1374CR#TRPBF offers a short-circuit protection feature, which will shut down the output if the current reaches an excessive level.

Conclusion
In conclusion, the LT1374CR#TRPBF is an efficient and powerful DC/DC switching regulator controller. It works by switching a MOSFET switch between the high voltage input and low voltage output at a given frequency and varying the time duration of the \'on\' and \'off\' times. This device offers an adjustable output voltage range of 1V-20V and current range of up to 2A with a minimum output voltage of 1V. Its features include adjustable switching frequency, accurate voltage control, high efficiency, and adjustable soft-start for smoother operations. The LT1374CR#TRPBF is suitable for a variety of applications, such as notebooks, netbooks, automotive systems, handheld electronics and instrumentation.

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